Preparation method of antibacterial polyester

A technology of polyester and antibacterial agent, applied in the field of antibacterial polyester and its preparation, can solve the problems of unsatisfactory fungal effect, affecting the appearance and feel of fiber weaving, and achieve the effect of simple operation

Active Publication Date: 2018-07-17
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-temperature resistant inorganic antibacterial agents, on the one hand, mainly inhibit bacteria, and have unsatisfactory effects on fungi that cause skin diseases or inflammations; and feel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of antibacterial polyester, the steps are as follows:

[0028] (1) Select p-hydroxybenzoic acid and PET with a number average molecular weight of 10000 to dry, the drying temperature is 100°C, the water content of the dried p-hydroxybenzoic acid is 20ppm, and the water content of PET is 20ppm;

[0029] (2) Melt and blend p-hydroxybenzoic acid and PET with a mass ratio of 15:1000 to obtain a blend. The melt blending is carried out in a screw extruder, and the temperature of the melt is 260 ° C. The screw extruder The temperature of each section is: 220°C in the first zone, 265°C in the second zone, 270°C in the third zone, 275°C in the fourth zone, 275°C in the fifth zone, 275°C in the head, and the melt blending time is 3 minutes;

[0030] (3) Drying the blend, the drying temperature is 110°C, and the water content of the blend after drying is 120ppm;

[0031](4) The blend is subjected to a solid-phase reaction for 10 h under a vacuum condition of ...

Embodiment 2

[0034] A preparation method of antibacterial polyester, the steps are as follows:

[0035] (1) Select p-hydroxybenzoic acid and PET with a number average molecular weight of 15000 to dry, the drying temperature is 120°C, the water content of the dried p-hydroxybenzoic acid is 30ppm, and the water content of PET is 30ppm;

[0036] (2) Melt and blend p-hydroxybenzoic acid and PET with a mass ratio of 16:1000 to obtain a blend. The melt blending is carried out in a screw extruder, and the temperature of the melt is 260 ° C. The screw extruder The temperature of each section is: 220°C in the first zone, 265°C in the second zone, 270°C in the third zone, 275°C in the fourth zone, 275°C in the fifth zone, 275°C in the head, and the melt blending time is 4 minutes;

[0037] (3) Drying the blend, the drying temperature is 120°C, and the water content of the blend after drying is 100ppm;

[0038] (4) The blend is subjected to a solid-phase reaction for 12 hours under a vacuum conditio...

Embodiment 3

[0041] A preparation method of antibacterial polyester, the steps are as follows:

[0042] (1) choose methyl p-hydroxybenzoate and the PBT that number average molecular weight is 20000 to dry, the drying temperature is 120 ℃, the water content of the dried methyl p-hydroxybenzoate is 20ppm, and the water content of PBT is 20ppm;

[0043] (2) Melt blending of methyl p-hydroxybenzoate and PBT with a mass ratio of 18:1000 to obtain a blend, the melt blending is carried out in a screw extruder, the temperature of the melt is 260 ° C, and the screw extruder The temperature of each section of the machine is: 250°C for the first zone, 260°C for the second zone, 260°C for the third zone, 275°C for the fourth zone, 275°C for the fifth zone, 275°C for the machine head, and the melting and blending time is 5 minutes;

[0044] (3) Drying the blend, the drying temperature is 130°C, and the water content of the blend after drying is 80ppm;

[0045] (4) The blend is subjected to a solid-pha...

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Abstract

The invention relates to a preparation method of an antibacterial polyester. The method comprises the steps that (1) antibacterial agent is melt blended with polyester to obtain a blend, the antibacterial agent is hydroxybenzoic acid and ester derivatives thereof, and the polyester contains terminal hydroxyl groups and the terminal carboxyl groups; (2) a solid phase reaction is conducted on the blend under vacuum conditions, which allows the antibacterial agent to be combined with the polyester through covalent bond, and the solid phase reaction temperature is 80-190 DEG C. 24-hour bacteriostasis rate of finally obtained antibacterial polyester against staphylococcus aureus and Escherichia coli is >=99%, the 24-hour bacteriostasis rate against the staphylococcus aureus and the Escherichiacoli after the antibacterial polyester is washed 50 times with water is 95%, and after the antibacterial polyester is illuminated for 12 hours by ultraviolet ray of intense of 70 MuW/cm<2>, the 24-hour antibacterial rate against the staphylococcus aureus and the escherichia coli is 98%. The preparation method is simple, the antibacterial agent reacts covalently with polyester molecular chains through low-temperature solid phase viscosity increasing, and excellent antibacterial properties are obtained while the quality of the polyester is ensured.

Description

technical field [0001] The invention belongs to the field of antibacterial polymer materials, and in particular relates to an antibacterial polyester and a preparation method thereof. Background technique [0002] With the improvement of people's quality of life, people pay more and more attention to creating and maintaining a healthy and hygienic living environment, and the demand for antibacterial materials in the fields of medical hygiene and food hygiene is getting higher and higher. [0003] Polyester refers to a polymer obtained by polycondensation of polyhydric alcohol and polycarboxylic acid, common ones are polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyhydroxyester Anti-ester (PHA), etc. Products made of PET have the advantages of high strength and modulus, good elasticity, wear resistance and impact resistance, and good creep resistance under load. They are used in chemical fiber, packaging Industries, electronic appliances, medical and h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91
CPCC08G63/912C08G63/916
Inventor 邹家熊陈康于金超崔世强元伟靳宏张玉梅王华平
Owner DONGHUA UNIV
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